Discussion on: Functional pipe

Tiny note; the pipe function behavior is not entirely as described here:

"Parameter 1 must be either of type Function[] or if multiple parameters are provided then each one should be of type Function but this requirement has not been met.");

With the current implementation, parameter 2 (or 3, or 4, ...) could also be a Function[].

For example, the following is valid, while it shouldn't be according to the above error:

pipe(
        () => "first function",
        [
          () => "second function, inside array",
          () => "third function, inside array"
        ]
      )

I had some fun setting up my first CodeSandbox to demo this with 1 additional test (open the sandbox page separately, because the dev.to embed doesn't allow the tests to be shown...)

The reason is that the concat trick const parameters = fns.reduce((output, value) => output.concat(value), []); will flatten just any value it gets, not only the first one.

I'd say this behavior is desirable. It could be useful! But it's not as described.